S1 E4: Scuba Diving in an Unexplored Cave

Steve joins expert underwater cave explorer Robbie Schmittner for his first dive in a cave that has yet to be explored. Robbie will install the guide line for the team to use as they make their way through unmapped waters.

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Expedition

Head into the unknown with naturalist Steve Backshall as he journeys to the world’s last unexplored places and faces challenges around the globe, encountering extraordinary wildlife and meeting remarkable people along the way.